A simple countdown timer in Javascript

countdown.js

/********************************************************************************************************************
Countdown.js is a simple script to add a countdown timer
for your website. Currently it can only do full minutes
and partial minutes aren't supported. This script is a fork of http://jsfiddle.net/HRrYG/ with some 
added extensions. Since the original code that I forked was released under Creative Commons by SA license, 
I have to release this code under the same license. You can view a live demo of this code at http://jsfiddle.net/JmrQE/2/.
********************************************************************************************************************/
function countdown(minutes) {
    var seconds = 60;
    var mins = minutes
    function tick() {
        //This script expects an element with an ID = "counter". You can change that to what ever you want. 
        var counter = document.getElementById("counter");
        var current_minutes = mins-1
        seconds--;
        counter.innerHTML = current_minutes.toString() + ":" + (seconds < 10 ? "0" : "") + String(seconds);
        if( seconds > 0 ) {
            setTimeout(tick, 1000);
        } else {
            if(mins > 1){
                countdown(mins-1);           
            }
        }
    }
    tick();
}
//You can use this script with a call to onclick, onblur or any other attribute you would like to use. 
countdown(n);//where n is the number of minutes required. 

Very useful and helpful code... Thank you very much for posting this code!

nice :)

nice :) +1

💯

hey I want to stop the timer without reloading the page, ex when the user hits a button, how can I do that?

Brilliant thanks

This is amazing! Bravo sir.

I want to reset the timer on some event how can I do that?

3 minute countdown jumps from 01 to 59 seconds on each iteration.

Amended line 20 as below to count the 00 seconds with a 1000ms timeout

setTimeout(function(){
if(mins > 1){
countdown(mins-1);
}
},1000);

I want to reset the timer on some event how can I do that?

countdown(n);//where n is the number of minutes required.

Your code wasn't verbose. It was easy to understand. Thanks for your work!
It was a great help for my project.
I actually forked your snippet in my gist, modified the coding a little bit for my app and want to share with others.
my version countdown

I want to reset the timer on some event how can I do that?

https://jsfiddle.net/gounshin/as6drbyL/1/

I am trying to add a play button and pause button to this timer. I got my pause button to work, but my I'm not sure how to get my play button to continue. Here is my Codepen

Just perfect. Thank you!

Works great, thank you!

Perfect, thank you!

Hey thank you, I just used this in a quiz application for my web dev class
https://prismaticdevelopmentstudios.github.io/web-apis_code-quiz/

nice, thank you!